Perhaps you should try some spelling variations:
thuc day » thuc dan, thuc vat
day hanh » day nhanh, day thanh, dao hanh
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
cua tre » cuu tre, cua triet, dua tren
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
cua te » cua tu

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky tang ma hoi. hieu ((ve cam) OR (ve cac)) thuc day hanh vi ((cua tre) OR (cua te))~.
• Adding a wildcard symbol may retrieve word variants: tu cac ky tang ma hoi. hieu ((ve cam) or (ve cac)) thuc day hanh vi ((cua tre) or (cua te))*.